In this photo taken on April 5 Secretary of Homeland Security Kirstjen Nielsen waits for US President Donald Trump as he arrives to tour the border...
{"Image ImageDescription": "In this photo taken on April 5, 2019, Secretary of Homeland Security Kirstjen Nielsen waits for US President Donald Trump as he arrives to tour the border wall between the United States and Mexico in Calexico, California. - US President Donald Trump on Sunday, April 7, 2019 announced Homeland Security Secretary Kirstjen Nielsen, the front-line defender of the administration's controversial immigration policies, would leave her position. \"Secretary of Homeland Security Kirstjen Nielsen will be leaving her position, and I would like to thank her for her service,\" Trump tweeted.  He added US Customs and Border Protection Commissioner Kevin McAleenan would become acting secretary. (Photo by SAUL LOEB / AFP)        (Photo credit should read SAUL LOEB/AFP via Getty Images)"}